Widowed retirees Celia Dawson and Alan Buttershaw rekindle a passionate relationship that fate stole from them decades earlier.
Celia and Alan decide to buy an expensive sports car instead of an engagement ring.
Celia and Alan go in search of a wedding venue, only to end up trapped in a haunted mansion.
Caroline and Gillian unexpectedly become close when Alan and Celia disappear for the night.
Alan has trouble choosing his best man, and John outs Caroline and Kate.
Alan calls off the wedding. Meanwhile, Gillian and Robbie grow closer.
As Alan and Celia seize the day, Gillian finds herself spiraling into a dark place; Caroline makes a bold decision involving Kate.
Alan and Celia's first day as man and wife is filled with tension; a new arrival surprises everyone; Caroline buys John out of the house.
Gillian is devastated when Celia reveals a huge personal secret that she has kept since she was fifteen while Alan distances himself further from her.
After the death of a friend, Alan and Celia decide to hold a second, public wedding ceremony; Caroline clashes with Kate's old friend Greg.
Celia's estranged sister Muriel arrives for the wedding; Caroline becomes increasingly lonely; Gillian tells the truth about Eddie's death.
Emotions run high as the time finally comes to celebrate the union of Alan and Celia, but will everything go off with or without a hitch?
Awaiting the birth of their child, Caroline and Kate make a decision. Someone from Alan's past unexpectedly surfaces. Gillian rekindles an old flame.
Alan reveals his secret to Celia, who takes out her hurt feelings on Caroline. Gillian suffers the consequences of her recent indiscretion.
Celia makes an effort to accept Alan's past. Gillian is tempted to choose a life-altering path. Caroline makes amends after a shocking turn of events.
A former student may be just the solution an overwhelmed Caroline is looking for. Gillian worries that Caroline may reveal her dark secret.
Caroline's household gains a surprising new member. Gary's neediness causes Alan to distance himself. Gillian resists a generous offer.
A confession leads Gillian to doubt Robbie's character. Celia encourages Alan to forgive Gary. Caroline realizes she can't hold onto the past.
Two years later, Caroline takes a new job, which brings big changes for the family. Gillian's convinced she's being haunted. Celia takes up acting.
Caroline tells Gillian the real reason she took the job. Alan confronts his fears after agreeing to help Celia. Gillian makes a stunning confession.
Despite a comfy life, Alan and Celia perplex each other with their latest choices as money becomes the focus of Gillian and Caroline's joint birthday.
An unplanned guest arrives with unexpected baggage while a piece of art triggers Gillian, and Caroline spends time with someone she hopes is special.
Celia and Alan's new ventures face troubling hurdles as Caroline wonders about her outward perception and Gillian gets pushed to her wits' end.
As Gillian ponders a major decision, Caroline must deal with an unwanted houseguest before Celia and Alan get sobering news.